Oh...man, that's not good. Sounds like you've etched the surface of your granite. There are some companies out there that claim you can restore the finish with their products yourself but I have no idea if it's true or if that's something worth risking. I've always been under the impression that etched granite needs to be restored by a professional. Good luck.

Granite installer highly recommended the use of Simple Green. I use the granite wipes after I wipe with just my soapy dish rag. I hate that my granite shows water marks - when I use the wipes they don't leave water marks.

I use 70% isopropyl alcohol (I think it's the strength rec by that doctor). I add the essential Lavender oil (I've seen it at Fairway, Whole Foods, Mrs. Green's, organic/health food stores....) because it has anti-bacterial properties of its own, and I like the scent. I've read (here) that it may alter the surface tension (of the alcohol and water) favorably as well. You can use as little as 10% alcohol to (90%) water and it will disinfect (again, according to the doctor), however, I use a higher am't of alcohol because it smears less, and cleans better. I started out using ~30% alcohol, but use somewhere around 50%-50% now. It's not exact. I top off my spray bottle when it gets low, or when I don't want to wait for it to become low. I eyeball the amounts, and leave a little room at the top of the bottle to tweak amounts as desired (I go by smell; just enough alcohol, just enough lavender... and by spray/wiping without smearing or streaking). I add maybe 20 drops of lavender oil, plus or minus. You can use other essential oils if you prefer. Tea tree oil is another one with natural anti-bac properties. I don't much care for it's scent, and avoided it because it is harmful to cats (don't know about dogs or other pets). I had resisted "making my own cleaner" for the first few years after our kitchen reno, but I do like this much better than the prepared products I'd been using, and I use it on the black enamel burner pans on our Wolf range, SS appliances, as well as on our granite. It's easy enough to mix up, and cheaper, too. I buy the larger bottles of alcohol, and try to pick up a few bottles when they're on sale. The lavender oil bottle, small as it is, lasts a long time.

Are you sure your granite even needs to be sealed? Many granites do not need sealer at all. A lot of fabricators seal the granite immediately after they install it, just as a matter of course and the "finale" to the installation, but the granite may not need it. What granite do you have? There is an easy way to see if your granite needs to be sealed or not. Drip some water on the counter. Let it sit for 15 minutes. If the water absorbs into the stone, the stone needs to be sealed. If the water is sitting on top after 15 minutes, then wipe it, and see if there is any water stain showing (it will go away in a few minutes). If there is, then some water has absorbed into the stone, and the stone needs to be sealed. If the water did not absorb and did not leave a water stain, the stone does not need to be sealed.